Ventilator.



UNITED STATES PATENT OFFICE. j

WALTER F. BRITToN, OF ANNISTON, ALABAMA.

VENTILATOR.

pecification of Letters Batent.

Patented. o,e1 ..'2'2, 1907.

- Application filed January 3.1967. Serial No. 350.580.

-To all whom it may concern:

Be it known that I, WALT R F. BRrr'roN, citizen of the United States, residing at Anniston, in the county ofCalhoun and State of Alabama, have invented new and useful Improvements in Ventilators, of which the following is a specification. I

This invention rgiatcs to ventilators of the type employed on the vent i i ting shafts or flucsof warehouses,

factories andother buildings, being cspecially directed to a cut-off member or valve sustained, in the ventilator andadapted for closing the upper end of the flue for cutting-off the draft therethrough when circumstances require.

whereby an induced or forced draft will be maintained through the flue, one whereby the entrance of exterior .currentsiof air into the flue is effectually prevented, and one wherein the cut-off valve will, under the action of fire inthe flue-,Jbe automatically released and thereeiter moved'by gravity to a closed position. Further objects of the invention'are to provide a evice of this class wherein the. valve will move freely to closed position and be -properly guided in itsmove-:- -ments one in which the valve will be normally locked llhe invention has for its objects to provide a' com-' pa'ratively simple, inexpensive d'eviceoi this character inopen position, and one wherein the-valve may be manually released and closedat will. i I

With these and other objects in view, the invention comprisesthe novel fieature's of construction and com-' bination of parts more fully hereinafter described.

In the accompanying drawings: Figural is a side'eleva tion of a ventilator embodying the invention. Fig. 2 I

is a vertical section taken centrallyiand longitudinally therethrough. Fig. 3 is a detail view of the keeper.

'Referringlto the'drawings, 1 designates the ventilating shaft or. flue having at its upper end a flared stiffen- .ing head 2, which constitutes, a valve seat 3 and in which is connected the upper-end eta downwardly and 1 outwardly inclined frusto-conical -guard member or apron 14 attached at its lower edge by means of clips-5 to upwardly and outwardly inclined supporting arms 6 in turn'attached to the flue 1, there being also attached to said flue and by means of the fastening bolts 7, w hich secure. the arms 6 in-placeyaplurality of vertical guidemembers or standards 8 terminated at their upper ends in overturned, downwardly and outwardly inclined. .frame members 9 having vertically depending portions 10 attached at their lower ,ends'to the puter ends .of the supporting arms 6" and forming in conjunction therewith a frame or super-structure carried by the flue.

Attached to the frame by means of the fastening members or bolts 11 which unite the frame portions 10 and arms 6 is a hollow sheet metal drum 12 arranged to inclose the'upper end of the fluel and having inwardly inclined upper and lower end portions or flanges "13 formed lryiluting or corrugating the metal in the opera tion of constructing the drum, while sustained above;

and suitably remote from the'upper end of the'flue is a conical protecting cap14 attached at its lower end to the frarne'members 9, there beingfixed in the cap a bearing 15', on which is journaled apulley 16 forapurpose which will presently appear. I

Slidably sustainedon the guides Sis an inverted conical cut-off member or valve 17 provided at its upper edge with ai'downturned flange 18, there being arranged on the'upper face of the valve-a weight 19 secured in placeby meansof'an eye-bolt 20 provided at its upper end with" an eye 21 and having tapped onto its lower end a nut 22 provided with an eye 23 for a piirpose which will prese'ntlyappear, there being arranged for travel on the pulley'16a wire or other flexible connection 24 en gaged at one end with'the eye 21 and at its other end witha' coupling piece 25 composed of fusible material and to which is also attached a flexible connection 26 which'extends downward through the flue.

The coupling piece 25 is adapted for engagement with a ke'e'per27 comprising a pair of bracket-arms attached in. the flue and having their ends spaced as at 28 tqiorm-arecess into which the piece 25 may be entered by a transverse movement for fixingthe .parts in position with the valve 17 raised to open position, as shown in Fig. 2. v

In .practice, the valve stands normally open to per- Init free passage of warm 'or foul airupward-through theflue 1 into which external air is prevented from entering byineans of thedrum; 12 and protecting cap-14, it being note d in thisbonnection that currents of air striking the drum will be deflected upward or downward by the inclined end portions 13, thereby drawing the air from the interior of the drum andicausing an induced or forced draft upwardthrough the dire, further that currents of air passing directly upward ordownward will be pre- 'yented from entering the flue respectively by the apron 4 and cap 14. I Shoulditbe'desiredat any time to close the flue for cutting off the ventilation therethrough, the

member 25 may, by manipulating the connection 26, be disengaged from the keeperflj, thus-allowing the valve 17 to move 'to closed positiom as illustrated 'by dotted.

lines in Fig. 2, under which conditions the valve will rest evenly on the seat 3. Whenthe parts are in normal position if a fire starts in the flue the fusible coupling piece 25 will bemelted, thereby releasing the connection 24 and permitting the valve to close automaticallyby gravity under the influence of weight 19. Un-.

drum s'u'stained-uponzand surrounding the upper end of the flue, a protecting cap mounted over and remote from the upper end of the fine, a cutoff valve siidahly sustained above the latter, means including a fusible piece for holdingthe valve in open position, said valve being adapted to closautomatiually when released, and means for guiding;- the valve in its movements.

2. In a device 0" the class described. :rfiae, vertical guide members arising thereliom, a protecting cap mounted over the hue and sustained by the guide members, a cutofi valve slidnbly mounted on said guides and adapted for (-losu the? upper end of the flue, and means including a' fusible piers for holding the valve-in open position.

I in a device oi the class described, a flue expanded at its uppov end to form a valve sent, a valve suitably guided for vert .al movement, means for normally supporting th valve :1 hove the seat, a protecting-cap supported above the flue and the valve and a frusto conical guard supported upon the line adjacent to its upper extrcinity. I

i. in a device of the class described, a fine expanded at its upper end to .torui a valve seat, a valve guided for vortieal movement, means for normally supporting the valve above the seat, a protecting cap supported above the flue and rho valve. a frusto conical guard mounted upon the line adjacent to its upper extremity and :1 hollow drum disposed about the flue, the protecting cap and the guard, spaced therefrom and having inwardly inclined flanges at its upper and lower ends.

In a device of the class described, a flue expandedai: its upper end to form a valve seat, a. frusto conical guard mounted upon the due adjacent to its upper-extremity, ver tical guides secured upon the flue, frame members connecting the guides with the frnsto conical guard, 11 valve mounted for vertical movement upon the guides:v :1 protecb cap supported upon the guides above the valve, :1 hollow drum mounted upon the frame members and having in \vardl inclined flanges at its upper and lower ends which extend above the protecting cap and below the guard re speutiv'ely, and means. for normally supporting the valve above the scat.

.ln testimony \vhereoi. l affix my signature in presence of two witnesses.

i WALTER F. Bm'r'roiv. Witnesses 'ii'oiix L. FLETCHER, I\' ALLEN. 

